221132399 has 2 divisors, whose sum is σ = 221132400. Its totient is φ = 221132398.

The previous prime is 221132383. The next prime is 221132423. The reversal of 221132399 is 993231122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221132399 - 2⁴ = 221132383 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221132369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110566199 + 110566200.

It is an arithmetic number, because the mean of its divisors is an integer number (110566200).

Almost surely, 2^221132399 is an apocalyptic number.

221132399 is a deficient number, since it is larger than the sum of its proper divisors (1).

221132399 is an equidigital number, since it uses as much as digits as its factorization.

221132399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 32.

The square root of 221132399 is about 14870.5211408343. The cubic root of 221132399 is about 604.7150710774.

The spelling of 221132399 in words is "two hundred twenty-one million, one hundred thirty-two thousand, three hundred ninety-nine".